《A lesson in a lab》教案

约1470字。
　　Module 5 A lesson in a lab
　　Period 1
　　Teaching aims:
　　1. Let the students know some words related to experiments, the lab and something like that
　　2. Review the usage of numbers/ fractions/ percentages
　　3. Know sth about Degrees of parison.
　　Teaching steps:
　　I. All of us have learned physics, biology and istry in middle school. Now let’s have a test to see how much you know.
　　Deal with Activity 1 on page 41. Choose the correct answers to the quiz.
　　Now play the tape for the students to listen and check their answers.
　　Answers:
　　1 a 2 a 3 a 4 a 5 b 6 b 7 b
　　II. First read the words and then ask the ss to translate them into Chinese. At last put them in pairs or groups.
　　Answers:
　　air-gas-oxygen contract-expand earth- sun- moon
　　gas-liquid-solid
　　III.. Answer the questions.
　　Answers:
　　1) Electricity, iron, some metals and air are natural
　　2) Steel, some metals and glass are man-made
　　3) Electricity and some metals can be man-made and occur naturally
　　IV. Turn to page 42.
　　Activity 1 Read the numbers. Pay attention to the position of the word “and”.
　　V. Fractions.
　　基数词+序数词，当分子大于1时，分母要加s
　　作主语时，谓语动词要根据of 后面的名词决定。
　　Answers:
　　two-fifths five-eighths nine-tenths three-eighths five-sixths
　　VI. Percentages
　　基数词+ percent/ per cent 注意：percent 永远单数形式
　　作主语时，谓语动词要根据of 后面的名词决定。
　　VII. Degrees of parison 1 & 2